Internal-combustion engine.



O. C. STEGLAT.

INTERNAL GOMBUSTION'BNGINE.

APPLIUATION FILED SE1 TL1 7,1910A 1,001,782. Patented A1'1g-29, 1911.

Strom/w96 -0TTO C. STEGLAT, F DETROIT; ItiCEIGN I'NrnnnnncoivinusrronENGINE.

Leonesa Specification of `Letters Iatent. Paigerrg Aug, 29, 15ml,

Application filed September 1'7, 1910. Serial` lNo. 582,59?.

To @ZZ whomfit moy-concern.'

Be it known that I, Orro C. STEGLAT, a

citizen of the United States, residing at Detroit,. in ,the countyofWayne, State of Michigan,v havej invented `certain 'new and.

Auseful lniproveme'nts in Internal#Com'busn tion Engines; and Idoher'ebydeclare the g following to be a full, clear; and exactdescription ofthe invention)- suchraswill enable ,others skilled .in theart to' which it appertains to make and use the same.

f This". invention .relates lto 'internal 'com- "bust-ion engines andhas `special. ieference .to an engine of the two cycle type.

The `principal object of theinvention is to provide yan improved andsimplied gein eral construction for an engineof this class. iAsecondobjectof` the invention is to pro vide an .engine of this class havingan improved construction ofcompression and eX- plosion cylindersg'thevenginebeing so con structed that thev compression of the explo- .sivemixture takesplace in two stages.

y A third objectof my invention is to' provide a construction of twocycle engine wherein back firing will be eliminated y AfourthY objectofvmy invention is to provide an engine of. this description which will-ive an vincreased power over other engines of the same cylinderdimensions.

. Withv the above and other objects in view the invention consists ingeneral of appair offalined cylinders combined'with cert-ain -novelvalve and piston arrangements.

The invention further consists ingenera'l of certain novel details ofconstruction and hina-tions of parts hereinafter fully del scribed,villustrated in tlej accompanying` drawings,'and specically set forth inthe claims. ,j

'In' the drawingthe ligure represents' a vertical section through anengine constructed in accordance with this invent-ion.

In the present embodiment of the invention there is employed anexplosion cylinder 10, which is -shown as vertically arranged andbeneath whichis a. compression cylinder 11.v These 'cylinders aresupported on a suitable base 12 carried on which are bearnigsrl for acrank shaft 14.

Between the cylinders 10 and 11 is a diaphragm 15 which is so arrangedas to constitute a head common to both cylinders,k the diaphragm being;the bottom head of the explosion cylinder and top head of the com-,pression cylinder.

The two cylinders are secured to the diaphragm by means of suitablebolts in the 'ordinary manner and the cylinder il is ol greater diameterthan the cylinder lO. The diaphragm 15 is-provided with a plurality ofopenings 16 above which are valve casings i7 provided with suitableseats and these openings are controlled by valves 19 which are soarranged as to open upwardly in the direction of the explosion cylinder.

in the cylinder l0 is a piston 20 and in the cylinder 1l is a similarpiston 2l. The

piston :ZOIis provided with the usual baille plate* 21 as 1s common intwo cycle gas eneines. A Apiston rod 22Y passes through a stufng'loonV23 in the diaphragm 15 and serves to connect the twopistons sovtliatthey are held to move inimison. i connecting` rod 24 is used to connectthe lower piston 2l with the crank shaft le. Explosion takes place inthe upper end of the cylinder l() and for the purpose of ignitingr themixture the usual spark plug' 25 is provided the connectionsV of whichare not shownas formingl vno specic part of this invention.

At 26 is a-carbureter which comznunicates by the inlet pipe 27 with thccvlinder ll immediately beneath the diaphragm This carbureter isprovided with the us check valve arrangement common to devices andwhich. is arranged to pre ent movement of air through the `earlnueter.in one direction while permitting its fren movement in the oppositedirection. immodiately above the diaphragm i5 the cylinder lOvisprovided with a port 28 which is controlled by a check valve 29 whichopens away from the cylinder. .This check valve and port affordcommunication with a bypass 30 the other end of which communicates' withthe cylinder I() intermediateQits ends, the communicating port being;zshown at 3l. Directly opposite the port 3l there is provided an exhaustpipe 32 also eonununicatingl with the cylinder 10. The einen: ings fromthe exhaust pipe and the bypass are so arranged that they r re onlyuncovered when' the piston Q0 reaches the lowerinost point of itsstrolte.

in the operation of this device the downward-movement of the piston 2ldrains air through the carbureter thus earbu'rizingr the samef Thisaction continues until the ton 2l has reached the lowermost point itsstroke. As the piston 21 moves zip-wf" l the carburized air in thecylinder ll forced out of said cylinder through the openings 1G in thediaphragm, the valves 'i9 rising' to permit the passage of the carhu.

. most point of its stroke the compressed mixture will. be forcedthrough the b v-pass into the cylinder-'10 above the piston 20 and willforce out before it the spent gases remaining in the cylinder 10 fromthe last explosion. Meanwhile a fresh charge of carburized air .has beendrawn into the cylinderll. As

the pistons again rise the lower piston acts as previously described andthe piston 20 completes the compression of the carburized air in theupper end of the cylinder l() until the spark passes through the igniter25. The explosion then takes place and forces the pistons downward, theent-ire- Voperation being repeated with each complete revolution of thecrank shaft and consequent complete reciprocation of the piston.

There has thus been provided a simple and efiicient device of the kinddescribed and for the purpose specified.

' Having thus described the invention what 'is claimed as new is 1. Inan internal combustion engine, an explosion cylinder, a compressioncylinder in axial alinement with said explosion cylinder, a diaphragmbetween said cylinders and forming a head common to both cylinders, saiddiaphragm being provided with an opening therein, a check valvecontrolling said opening and arranged to open toward the explosioncylinder, pistons reciprocable in unison in said cylinders, an inletpipe communicating with the compression cylinder adjacent saiddiaphragm, a 1oy-pass leading from the end ,of the explosion cylinderadjacent said diaphragm to a point between the ends of the explosioncylinder, and a check valve in said ley-pass opening away from the endadjacent the diaphragm.

2. In an internal combustion engine, an explosion cylinder, acompression cylinder in axial alinement with said explosion cylinder andof greater diameter than said explosion cylinder', a diaphragm betweensaid cylinders and forming a head common to bot-h cylinders, saiddiaphragm being provided with an opening therein` a check valvecontrolling said opening and arranged to open to-l ward lthe explosioncylinder, a piston in said explosion cylinder, a, second. piston in thccompression cylinder, a' piston'rod con-- necting said pistons, ani'nlet `pipe communicating with the compression cylinder adjacentsaiddiaphragm, a byrpass leading from Jthe end of the explosion cylinderadjacent lsaid diaphragm to a point intermediate the ends of theexplosion cylinder, a check Valve in said by-pass opening away from theend adjacent thediaphragrn, and an exhaust pipe communicating with saidexplosion cylinder at a pointfopposite the end of the by-pass remotefrom said diaphragm'tf-,the piston in the explosion cylinder controllingthe oiposite'ly disposed by-pass and exhaust .pipe penings.

In testimony whereof, Ivaffix my signature, in presence of twowitnesses.

OTTO C. STEGL -T. Witnesses:

ROBERT RIDLEY, ALEX. HAYES.

Copies of this patent may lbe otitanediffor ve cents each, by addressingthe Commissioner of Patents.

Washington, 1). G.

